3:8 decoder/demultiplexer for address decoding and signal routing
The SN74HC138QPWRQ1: It accepts three binary address inputs and activates one of eight active-low outputs, making it the standard building block for memory-mapped I/O decoding, chip-select generation, and data routing in digital systems. Operating from a 2V to 6V supply, the device spans the full 74HC voltage range and delivers 5.2 mA source and sink current per output.
Automotive-grade address decoding with wide supply tolerance
AEC-Q100 qualification means the SN74HC138QPWRQ1 has passed the full suite of automotive stress tests: high-temperature operating life (HTOL), temperature cycling, ESD robustness, and latch-up immunity. This is the grade required for ECU, BMS, and ADAS sensor interface boards that must survive 15-year vehicle lifetimes. At 3.3V the propagation delay is typically 20 ns; at 5V it drops to about 15 ns, fast enough for SPI chip-select strobes and memory address decoding at clock rates up to 25 MHz. Three enable inputs (two active-low, one active-high) allow cascading multiple decoders without external gates. A single SN74HC138QPWRQ1 decodes a 3-bit address space; stacking two devices with the enable chain yields a 4-to-16 decoder covering 16 select lines.
Sourced through authorized distribution channels. Pricing and lead time are confirmed at quote against your BOM quantity. The 16-TSSOP package is a standard TI footprint with broad second-source availability across the 74HC family.